Polarization Switching Induced by Slowing the Dynamic Swinglike Motion in a Flexible Organic Dielectric

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	Polarization Switching Induced by Slowing the Dynamic Swinglike Motion in a Flexible Organic Dielectric
	Ji, Chengmin 1; Li, Shenhui 2; Deng, Feng 2; Sun, Zhihua 1; Li, Lina 1; Zhao, Sangen 1; Luo, Junhua 1
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2016-12-08
卷号	120 期号:48 页码:27571-27576
英文摘要	Molecular motions with large amplitude in close-packed crystals accompany large distortions of the molecular configuration, which generally generate orientational structural transitions between diverse states and enable the tuning of their bulk physical properties. We present a flexible organic dielectric, di-n-butylammonium chlorodifluoracetate (1), which exhibits a reversible temperature-induced spontaneous polarization switching at 243 K (T-c). Ferroelectric hysteresis loop measurements and second harmonic generation experiments reveal its excellent polarization switching capacity with spontaneous polarization of 3.9.4 mu C cm(-2). Temperature-dependent solid-state nuclear magnetic resonance measurements clearly elucidate the dynamical mechanism of polarization switching of 1. Above T-c, an active swinglike motion in long chain di-n-butylammonium (DBA) cation is confirmed, resulting in complete obliteration of the dipole moments. When the temperature decreases below T-c, the swinglike motions are frozen and the whole DBA cation becomes considerably more rigid, corresponding to polar order, which greatly contributes to polarization switching. It is believed that this finding opens up a potential strategy for the design of new polar materials as switchable electric devices.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
研究领域[WOS]	Chemistry ; Science & Technology - Other Topics ; Materials Science
关键词[WOS]	MOLECULAR MACHINES ; PHASE-TRANSITION ; CHAINS ; FERROELECTRICITY ; CRYSTALS ; TEMPERATURE ; PEROVSKITE ; FRAMEWORK ; DESIGN
收录类别	SCI
语种	英语
WOS记录号	WOS:000389624400052
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/9996]
专题	武汉物理与数学研究所_磁共振应用研究部
作者单位	1.Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fujian, Peoples R China 2.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan Ctr Magnet Resonance, State Key Lab Magnet Resonance & Atom Mol Phys, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Ji, Chengmin,Li, Shenhui,Deng, Feng,et al. Polarization Switching Induced by Slowing the Dynamic Swinglike Motion in a Flexible Organic Dielectric[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2016,120(48):27571-27576.
APA	Ji, Chengmin.,Li, Shenhui.,Deng, Feng.,Sun, Zhihua.,Li, Lina.,...&Luo, Junhua.(2016).Polarization Switching Induced by Slowing the Dynamic Swinglike Motion in a Flexible Organic Dielectric.JOURNAL OF PHYSICAL CHEMISTRY C,120(48),27571-27576.
MLA	Ji, Chengmin,et al."Polarization Switching Induced by Slowing the Dynamic Swinglike Motion in a Flexible Organic Dielectric".JOURNAL OF PHYSICAL CHEMISTRY C 120.48(2016):27571-27576.